Do closed tops affect ph ?

[Candymancan]

Just curious.   I never really test my ph.  As everyone of my corals grow fine including the 20 or so sps i have 8 of which are different acros.   All together i have about 70 or so different corals in my 135g.   

 

But for kicks i tested it today and it was reading 7.8.   Tank is on the 3rd level of the house.  And 99% of it is covered with glass tops to prevent fish from jumping. Only slivers are open for my two emperor 400 HOBs.  All my power heads point to the surface so i have tons of water movement on the surface.  I prefer pointing em up for a crashing effect of flow in the tank rather then pointing them in the tank to directly blast corals with flow.

 

Anyway.. i know PH is effected by oxygen in the room. And it is my bedroom so me breathing probably doesnt help.  Just curious. I can open 4 inches on the left of the tank and place 1 or 2 120mm computer fans i have wired up to a power bar to get air flowing under the glass.  Should i do that or not bother since everything is growing.  I suppose doing it and thrn testing later for ph to see if ot changes wont hurt

[Joboo]

Yes. I have a bio cube 29G and when the glass top is OFF the PH rises. Its not enough for me to do something about it and I usually just keep the glass on. Also, gas stoves will also impact PH. If you have one near your tank don't be surprised if you see a dip in your PH.  Anything that increases CO2 that is near the tank can influence PH. . I usually crack a window that is close to my tank to offset it. But its really been a non an issue.

[Candymancan]

Yea i have a window 2 feet away.. i turned my ceiling fan on full blast and opened the window.  Took a couple tops off too.. ima experiment to see if the ph goes up or not.  Just curious if itll go up and by how much

[Joboo]

a PH of 7.8 is not great but not that bad. once your lighting kicks in for the day it will go up, then down again. Its a constant roller coaster with PH. 

[Candymancan]

Well the lights have been on for 4 hrs now and its 7.8, checked my 60g hex which has no corals no fish or rocks just fiji pink sand and a long spine sea urchin.  I used the 60g recently to hold my corals when i did hypo 

 

Its 7.8 as well, so it might be the co2 in my room.  Lets see if it goes up in a few hours with the windows open and ceiling fan on with the tops off